HD 189733  activity at key species emission lines versus HST orbits during the 5-h duration of the HST/COS G130M program used in this study. The solar flare activity is taken from Table 3. Open circles denote HST orbit 1, inverted open triangles orbit 2, filled triangles orbit 3, diamonds orbit 4, and stars the solar medium flare activity. The corresponding statistical noise levels are shown as gray error bars.